Ignition-dynamo.



SAIVIUEL CHRISTOPHER MCKEOWN, OF SUVMTER, SOUTH CAROLINA. ASSIGNOR. BY

MESNE ASSIGNMENTS, TO SPLITDORF ELECTRICAL ooMPANY. or NEWARK. nnw

JERSEY, A CORPORATION OF NEW JERSEY.

IGNITION-DYNAMO.

Maasai.

Application filed July 12, 1913.

To all tlf/wm 'it may conce/1111y Be it linown that l, SAMUEL, Cnms'rornnn hfiolnowx, a citizen of the United States,l residing at Sumter, in the county of Sumter and State of South Carolina, have invented certain new and useful Improvements in IgnitionDynamos, of which the following is a specification,'reference being had to the accompanying drawing.

My invention relates to ignitionA dynamos and particularly to those of the magneto type. its objects are: to provide an eiicient magneto of few parts and simple construction` easy to assemble. There are other advantages such as no moving Wire or sliding contacts, the production of a magneto of the in'ductor type with only a single air gap, and improved means for advancing and re- .tarding the spark.

Figure 1 shows a magneto in section, embodying my invention. Fig. 2, a section of same on the line A B, Fig. 1.

l denotesa non-magnetic base, on which is secured in any .suitable manner the/permanent magnet 2, the poles of which are provided with the usual pole shoes 3 and 4. Attached to the base are the non-magnetic plates 5 and 6 which support a core structure 7 preferably oflaminze. The inner cheeks of the extremities 8 and 9 of the core are parallel, and in contact therewith are the rotor elements 10'and 11 of magnetizable material, axially separated by the non-magnetic block 12. An-y suitable shaft arrangement may be employed for the rotor, such as the shafts 13 and 14 journaled either in the core 7 or the plates 5 and 6.

Any suitable winding 15 is placed 'about the core 7. A suitable location is as shown in Fig. 2 although any other arrangement may be employed.

To enable the spark to be advanced and retarded, I provide a cylinder between the rotor and the pole shoes of the magnet, composed of the magnetic sections-16 and 17, and non-magnetic sections 18 and 19. A projecting handle 2O enables the cylinder t0 be rotated, land Lit is obvious' how, by varying the position of this' cylinder, the relative position of the pole shoes 3 extensions) to thee'rotor are varied,.thereby advancing or retaining the spark 1n the usual manner;- In machines Where 1t 1s not Specification of Letters Patent.

and 4 (to which the' sections 16 and 17 simply form Serial No. 778,721'.

desired to advance and retard the spa rlf, the cylinder member may be omitted.

rilhc operation of this magneto will be ap parent from a study of the 'ilrawings. Supposing 3 to be of N polarity, and the rotor is'moving to the left, lig. 1, when 10 is opposite 3, lines of force will flow from 3 into l0 to i) through 7 to 8, into 11 and to 4, (disregarding the cylinder 16, 17). lWhen the rotor is in the opposite position then the lines will flow from 3 to 11 to 8, through 7 to 9 to 10 and to 4. This causes alternate 'reversals of liux through the core 7 which influence winding 15 in the usual manner.

I claim- 1. In an ignition dynamo, a U shaped field magnet, a generating coil and a core therefor, and a rotor having a path of travel between the extremities of said core and comprising inductor elements axially magnetically separated from each other, said elements magnetized by the field magnet and having their polarity reversed at each rotation.

2. 1n an ignition dynamo, a U shaped core having extremities spaced apart, a rotor journaled to turn between said extremities, said rotor comprising magnetic elements magnetically separated from each otherand having continuous rotary magnetic relation with the side faces of said vcore extremities, winding on said core, and a field magnet in inductive relation to said rotor, the arrangement being such that the polarity of each rotor element is reversed at each rotation.

3. In an ignition dynamo, a U shaped core' structure having extremities spaced apart, a rotor `iournaled t0 turn between said extremities, extending longitudinally between the extremities of the core, and having suitable bearing supports, said rotor comprising a pair of axially separated mag-4 netizable members having end surfaces in sliding contact With the inner faces of said core extremities independently of said bearing supports, together with a magnet in inductive relation to saidrotor.

4. In an ignition dynamo, a core structure having axially alined aperturesin opposite polar extremities, a rotor.havng shaft eX- tensions journaled in said apertures, and

having a main body adapted to be magnetized. a coil on said core structure and a field magnet in inductive relation to said rotor, adapted to reverse the magnetization of the iotoi body at each rotation.

5. In an ignition dynamo a substantially U shaped core sti-rature carrying a winding and having axialiy alined bearing apertures inits extremities, a rotor journaled in said apertures and having end portions of magnetic material in magnetic and conductive relation respectively to the inner faces of said extremities but magnetically insulated from each other, together with a magnet in inductive relation to said rotor.

6. In an ignition dynamo, a U shaped core carrying a generator winding and having extremities spaced apart with the inner cheeks opposite and parallel to each other, and a rotor between said extremities having a right cylindrical path of rotation and end surfaces of magnetic material rotating in continuous magnetic relation with the inner parallel cheeks of said core extremities, but magnetically insulated from eachother, togetherv with a magnet in inductive relation to said rotor.

7. In an ignition dynamo, a U-shaped core carrying a winding, a rotor having its axis of rotation in a plane with the extremities of said core and its path of travel entirely within the space between said extremities, and a U-shaped magnet having its poles at right angles to the axis of rotation of said rotor and in inductive relation thereto.

8. In an ignition dynamo, a core member' having extremities spaced apart, journal bearings associated therewith, arotor journaled in said bearings to turn between said extremities and extending from one to the other, said rotor comprising magnetizable elements having rotary contact with the side -aces of said extremities independently of the oiirnal bearings, and a magnet in fixed inductive relation to said rotor. y

9. In an ignition dynamo, a core member having extremities spaced apart and forming bearing supports', a rotor journaled to turn between said supports and extending longitudinally between them said rotor comprising a pair of axially separated magnetizable members having end surfaces in sliding contact with the inner faces of said extremities independent of said bearing supports, together witha stationary magnet in normally iixed inductive relation to said rotor.

10. In a'n ignition dynamo, a base, extensions on said base forming bearings, a fixed substantially U-shaped core member having upies of this patent may be obtained for polar extremities and xedly secured to said base, a generator winding on said member, a magnet having its poles positioned at right angles to an axial line through said bearings,

revoluble means comprising members in permanent magnetic relation to said polar extremities or said core member yournaled in said bearings for conducting the flux from 12. An ignition dynamo comprising a U-` 'shapedcore member carrying a winding, a base of non-magnetic material, a magnet mounted upon said base, a rotary iiiductor embraced by the extremities of said core member in an endwise position and having st-ub shafts which project through apertures in said member, andlateral bearing inembers supported by said base for supporting said inductor and core members.

13. A magneto electric machine comprising a U-shaped permanent magnet, a U- shaped core member having apertures in its extremities on a line extending transversely thereof, arotor structure embraced by said extremities 1and comprising inductor elements, each of which in all angular positions is directly magnetically associated with one of said extremities, a non-magnetic base supporting said magnet, rotor and core inember, and means comprising ing alternately magnetic and non-magnetic sections interposed between said magnet and rotor structure whereby the magnetic relation of the poles of said Amagnet to the extremities of said core member may be varied for timing purposes, substantially as described.

In testimony whereot I hereunto affix my signature in the presence of two witnesses.

i 'SAMUELl CHRISTOEHER MGKEOWN.

Witnesses:

R. M. WARREN, B. RANDALL.

ve cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

'zio

a Cylinder liav- 

